PHP Fatal error: Unsupported operand types solution

During the PHP development process, we often encounter some error prompts, one of the most common errors is "PHP Fatal error: Unsupported operand types". This kind of error message can leave developers confused and wondering how to fix the error. This article will explain why this error occurs and how to solve it.

What is "PHP Fatal error: Unsupported operand types"?

"PHP Fatal error: Unsupported operand types" is a common PHP error. This error message usually tells the user that a serious error has occurred, causing the script to fail to run. This error message is printed when the PHP interpreter encounters an unsupported operator type while running code.

For example, in the following code example, we try to add strings and integers:

$a = "Hello World";
$b = 123;

$c = $a $b;

When we execute the above code, the following error message will appear:

PHP Fatal error: Unsupported operand types in /path/to/ script.php on line 5

How to solve the "PHP Fatal error: Unsupported operand types" error?

First, we need to determine what type of error caused this error. In this case, we are trying to add strings and integers, which causes the error to occur. In PHP, using the wrong operator or operation type can lead to similar errors.

So we need to determine whether this error is caused by using the wrong operator or operation type. In this case, we need to examine the code and find where the wrong type of operation is used. In this case, we have to use a string concatenation operator "." to concatenate two strings.

The following is the modified code:

$a = "Hello World";
$b = 123;

$c = $a . $b;

In the above code, we use the concatenation operator "." to connect two strings. Now the code runs correctly and outputs the results.

Summary

"PHP Fatal error: Unsupported operand types" error is caused by using the wrong operator or operation type. In the error message, PHP prompts us on which line the error occurs. We can easily resolve this error by checking it and making appropriate fixes. It should be noted that this error may be caused by other reasons, and we should locate and solve the error prompt.

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